CN103241828A - Self-cleaned activated biofilter - Google Patents
Self-cleaned activated biofilter Download PDFInfo
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- CN103241828A CN103241828A CN2013101867832A CN201310186783A CN103241828A CN 103241828 A CN103241828 A CN 103241828A CN 2013101867832 A CN2013101867832 A CN 2013101867832A CN 201310186783 A CN201310186783 A CN 201310186783A CN 103241828 A CN103241828 A CN 103241828A
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Abstract
The invention belongs to the technical field of sewage treatment, and in particular relates to a self-cleaned activated biofilter. The self-cleaned activated biofilter comprises a reactor which is internally provided with a filler cavity wide on the upper part but narrow on the lower part. The filler cavity is internally provided with a water distribution system. A water outlet tube is arranged at the top of the reactor. A height adjustable sleeve is arranged at the inlet of the water outlet tube. The water level of the self-cleaned activated biofilter provided by the invention can be adjusted by adjusting the height of the sleeve, so that the biofilter is very convenient to adjust, low in investment and operational cost and good in denitrification effect, can continuously operate without back wash and stoppage, and is simple to operate and manage.
Description
Technical field
The invention belongs to technical field of sewage treatment equipment, be specifically related to a kind of self-cleaning type activated biofiler.
Background technology
China still faces a lot of environmental stresss at present, the lake, reservoir, the offshore sea waters eutrophication problem is still outstanding, total amount of sewage discharge still continues to increase, under the background of energy-saving and emission-reduction, though the total emission volumn of COD and ammonia nitrogen is downward trend, but the quantity discharged of total nitrogen also excludes the statistical indicator of the environmental aspect communique of country, the national standard of some present industries is as " ammonia synthesizing industry pollution discharge standard " (GB 13458-2001), " brewing industry pollution discharge standard " is though (19821-2005) wait and only restriction is made in the discharging of ammonia nitrogen, " urban wastewater treatment firm pollutant emission standard " (GB18918-2002), " yeast industry pollution discharge standard " (GB 25462-2010), " starch industry pollution discharge standard " (GB 25461-2010) etc. not only proposed strict requirement to ammonia nitrogen and to total nitrogen, and the solution of eutrophication problem must all be controlled ammonia nitrogen and total nitrogen.No matter therefore be that city domestic sewage or trade effluent will be more and more stricter to the control of this index of total nitrogen.
China's town domestic sewage is handled and has substantially all been adopted A/O, the A that possesses the denitrogenation dephosphorizing function now
2Technologies such as/O, oxidation ditch, CASS, it handles water outlet can reach " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) standard (NH of one-level B
3-N＜5mg/L, T-N＜15mg/L), and to reach one-level A standard (NH
3-N＜5mg/L, T-N＜15mg/L) need follow-up advanced treatment toward contact, conventional physico-chemical processes advanced treatment process such as treatment effects such as flocculation sediment, filtration are not very good or the investment working cost is too high, biological advanced nitrogen can possess wide application prospect cheaply; And the treatment process of trade effluent is varied, state of the art varies especially, especially the starch wastewater of high density, beer waste water, leather-making waste water, pharmacy waste water etc. generally all adopt anaerobism pre-treatment (UASB, IC, AF etc.) and routine biochemistry to handle, and it handles water outlet should be able to reach NH
3The standard of-N＜15 ~ 25mg/L, T-N＜30 ~ 40mg/L, and in actual engineering operation, the processing denitrification effect of trade effluent is often not satisfactory.The contriver had applied for the biological advanced nitrogen treatment unit of CN201120415861.8 reverse-flow moving-bed in 2011, but after use in the contriver find, the adjusting of CN201120415861.8 median water level is convenient inadequately, cause in the membrane carrier separator shore pipe biomembranous discharge rate to adjust difficulty, therefore research and develop a kind of device of being convenient to regulate water level and in a hurry can treat.
Summary of the invention
The purpose of this invention is to provide a kind of self-cleaning type activated biofiler of being convenient to regulate water level.
The present invention is by the following technical solutions:
The self-cleaning type activated biofiler, comprise reactor, be provided with packing cavity in the reactor, the bottom of packing cavity is wide at the top and narrow at the bottom, be provided with water distribution system in the packing cavity, the top of reactor is provided with rising pipe, be provided with the center stripping tube that runs through packing cavity in the reactor, the upper and lower end opening of center stripping tube, stripping tube lower ending opening place, center is provided with inlet pipe, the top of center stripping tube is provided with the membrane carrier separator, and the top of center stripping tube is stretched in the membrane carrier separator, and the ingress of rising pipe is provided with the adjustable sleeve of high and low position.
The outer wall of rising pipe ingress is provided with outside screw, is provided with the internal thread suitable with outside screw in the sleeve, and the degree of depth that the height of sleeve position is regulated outside screw and screw-internal thread fit by turnbarrel is regulated.
Reactor is right cylinder or polygonal body, and when reactor was right cylinder, the bottom of packing cavity was the taper bucket, and when reactor was polygonal body, the packing cavity bottom was the chamfered edge taper, and its cross section is the Polygons that adapts with the polygonal body cross section.
Described water distribution system comprises the person in charge of ring-type, and the person in charge is provided with arm, and the person in charge is provided with water-in, and water-in is connected with water inlet pipe.
When reactor was right cylinder, the bus at the taper bucket intersection point place of the extended line of arm and itself and packing cavity was 90 ± 5 °; When reactor was polygonal body, the packing cavity inwall at the intersection point place of the extended line of arm and itself and packing cavity was 90 ± 5 °.
Described membrane carrier separator comprises urceolus, the inwall of urceolus is provided with the ring protection circle, be provided with first step baffle plate in the urceolus, the upper end open of center stripping tube is positioned under the first step baffle plate of membrane carrier separator urceolus, and center stripping tube upper end open communicates with urceolus inside; The outer tube inner wall of first step baffle plate below is provided with one or more downward-sloping baffle plates, and the urceolus of first step baffle plate top is provided with the aperture, and the outside of position, aperture is provided with a shell on the urceolus, and the bottom of shell is provided with shore pipe.
The top of the water distribution system in the described packing cavity is provided with aerating system, and the inlet mouth of aerating system is connected with inlet pipe.
The bottom of described packing cavity is provided with evacuated tube.
The exit of inlet pipe extends to 1-2cm in the stripping tube lower ending opening of center, and the import of inlet pipe is positioned at the top of reactor, effectively prevents the filler resorption.
When self-cleaning type activated biofiler of the present invention uses, sewage is entered the person in charge of water distribution system by water inlet pipe, discharged by arm, sewage changes flow direction and upwards flows under the effect of packing cavity lower inner wall, by being filled with the packing cavity of carrier, sewage by in the process of carrier through joining the microbiological deterioration that is attached on the carrier, carry out nitrated or denitrification, sewage after handling continues to rise, and is finally discharged by rising pipe; Along with constantly carrying out of nitrification and denitrification, the microbial film that carrier surface is aging need clean, this moment, inlet pipe provided the power of carrier flow, carrier is entered in the stripping tube of center, carrier is in the stripping tube of center and bubble, tube wall generation strong collision, high velocity air in the stripping tube of center tentatively separates microbial film from carrier, final microbial film and carrier are raised and enter in the membrane carrier separator urceolus, carrier at first bumps with first step baffle plate, wash-out microbial film to a certain extent, carrier falls under action of gravity then, continue to bump with downward-sloping baffle plate, microbial film is again by wash-out, carrier continues to fall afterwards, through repeatedly baffle plate collision artifact film substantially by wash-out totally, carrier is in landing simultaneously, with also phase attrition sassafras in the collision process of baffle plate, microbial film is also cleaned in the process that carrier falls, final realization microbial film separates with carrier, microbial film is discharged by the aperture by top-down current, finally enter in the shell and discharged by shore pipe, and the carrier after the cleaning renewal falls in the packing cavity under the effect of own wt, begin the nitrated of next round, denitrification, the bottom wide at the top and narrow at the bottom of packing cavity make things convenient for the smooth landing of carrier to the bottom.
Required oxygen when aerating system provides nitrated or denitrification.
When needs are regulated in the shore pipe biomembranous output, water level in the reactor is regulated, regulate biomembranous output in the shore pipe thereby the pressure that brings according to the variation of water level is different, the degree of depth that the adjusting of water level is regulated outside screw and screw-internal thread fit by turnbarrel is regulated, the degree of depth of outside screw and screw-internal thread fit is more shallow, then the position of sleeve is higher, and water level is higher; The degree of depth of outside screw and screw-internal thread fit is darker, and then the position of sleeve is lower, and water level is lower, thereby adjusts the water level in the filter tank easily.
Water distribution system of the present invention comprises the person in charge of ring-type, the person in charge is provided with arm, and the quantity of arm can arrange adjustment as required, generally can arrange 6-8, when reactor was right cylinder, the bus at the taper bucket intersection point place of the extended line of arm and itself and packing cavity was 90 ± 5 °; When reactor was polygonal body, the packing cavity inwall at the intersection point place of the extended line of arm and itself and packing cavity was 90 ± 5 °, is the best with 90 ° all, saved reflection cone like this, reduce the parts in the filter tank, reduced cost, improved the current situation in the filter tank.
Can adopt quartz sand in the packing cavity of the present invention, haydite, hard coal, garnets etc. are as bio-carrier, cultivate microbial film, make in the microbial film of filler adheres and be rich in nitrifier and denitrifying bacteria, utilize the constructional feature of reactor, make water (flow) direction from bottom to top, the filler travel direction from top to bottom, make bio-carrier continuous flow in reactor, the power of carrier continuous flow is provided by the air lift effect simultaneously, avoid stopping up, make microbial film coming off from the bio-carrier simultaneously, realize biomembranous renewal and get rid of aging microbial film, avoid the obstruction of reactor and the continuous operation of realization response device, do not need to carry out back flushing.Device replenishes additional carbon strengthened denitrification effects such as methyl alcohol, ethanol after using for some time in case of necessity in water inlet, the nitrogen that overcomes numerous bio-denitrification technologies is removed the shortcoming of ability, and can realize the complete sets of equipmentization that middle-size and small-size sanitary sewage and trade effluent advanced nitrogen are handled.
The regulation of level facility of self-cleaning type activated biofiler of the present invention, the investment and working cost is low, denitrification effect is good, can move continuously, not carry out back flushing, can not stop up, operational management is simple, realize nitrated, denitrification or nitration denitrification simultaneously by adding source of the gas, carbon source, for city sewage deep treatment, the water outlet total nitrogen can be lower than 2mg/L, for trade effluent, the water outlet total nitrogen can be lower than 5mg/L.
The objective of the invention is to be easy to nitrifier and denitrifying bacteria in the carrier surface cultivation, at first is that microbial film (nitrifier, denitrifying bacteria, anerobe, hold concurrently oxygen bacterium, heterotrophic bacterium, autotrophic bacteria etc.) is attached to carrier surface; Next is to realize nitrifier, denitrifying bacteria, anerobe, the layerings in microbial film such as oxygen bacterium, heterotrophic bacterium, autotrophic bacteria of holding concurrently, the power of the continuous flow of bio-carrier bed is provided by the air lift effect, avoid stopping up, microbial film is come off from bio-carrier, realize biomembranous renewal and get rid of aging microbial film.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the enlarged diagram of the rising pipe that is provided with sleeve among the present invention;
Fig. 3 is the front view of water distribution system;
Fig. 4 is the A-A view of Fig. 3;
Fig. 5 is the structural representation of membrane carrier separator.
Embodiment
Self-cleaning type activated biofiler as shown in Figure 1, 2 comprises reactor 10, and being provided with the bottom in the reactor 10 is the packing cavity 11 of taper bucket, is provided with water distribution system 6 in the packing cavity 11, and the bottom of packing cavity 11 is provided with evacuated tube 13; Be provided with the center stripping tube 12 that runs through packing cavity 11 in the reactor 10, the upper and lower end opening of center stripping tube 12, stripping tube 12 lower ending opening places in center are provided with inlet pipe 8, the exit of inlet pipe 8 extends to 1-2cm in center stripping tube 12 lower ending openings, the top of center stripping tube 12 is provided with membrane carrier separator 5, and the top of center stripping tube 12 is stretched in the membrane carrier separator 5; The top of the water distribution system 6 in the packing cavity 11 is provided with aerating system 9, and the inlet mouth of aerating system 9 is connected with inlet pipe 8; The top of reactor 10 is provided with rising pipe 3, the ingress of rising pipe 3 is provided with the adjustable sleeve 4 of high and low position, the outer wall of rising pipe 3 ingresss is provided with outside screw, be provided with the internal thread suitable with outside screw in the sleeve 4, the degree of depth that the height of sleeve 4 positions is regulated outside screw and screw-internal thread fit by turnbarrel 4 is regulated.
When the present invention uses, sewage is entered the person in charge 61 of water distribution system 6 by water inlet pipe 1, discharged by arm 62, sewage changes flow direction and upwards flows under the taper bucket effect of packing cavity 11, by the packing cavity 11 that is filled with carrier, sewage by in the process of carrier through joining the microbiological deterioration that is attached on the carrier, carry out nitrated or denitrification, sewage after handling continues to rise, and is finally discharged by rising pipe 3; Along with constantly carrying out of nitrification and denitrification, the microbial film that carrier surface is aging need clean, this moment, inlet pipe 8 provided the power of carrier flow, carrier is entered in the center stripping tube 12, carrier is in center stripping tube 12 and bubble, tube wall generation strong collision, high velocity air in the center stripping tube 12 tentatively separates microbial film from carrier, final microbial film and carrier are raised and enter in membrane carrier separator 5 urceolus 51, carrier at first bumps with first step baffle plate 52, wash-out microbial film to a certain extent, carrier falls under action of gravity then, continue to bump with downward-sloping baffle plate 53, microbial film is again by wash-out, carrier continues to fall afterwards, through repeatedly baffle plate collision artifact film substantially by wash-out totally, carrier is in landing simultaneously, with also phase attrition sassafras in the collision process of baffle plate, microbial film is also cleaned in the process that carrier falls, final realization microbial film separates with carrier, the microbial film that comes off is discharged by 54 apertures by top-down current, finally enter in the shell 55 and discharged by shore pipe 7, and the carrier after the cleaning renewal falls in the packing cavity 11 under the effect of own wt, begin the nitrated of next round, denitrification, the taper square sheet of paper used for painting or calligraphy of packing cavity 11 just the smooth landing of carrier to boring the end.
Claims (9)
1. self-cleaning type activated biofiler, comprise reactor, be provided with packing cavity in the reactor, the bottom of packing cavity is wide at the top and narrow at the bottom, be provided with water distribution system in the packing cavity, the top of reactor is provided with rising pipe, be provided with the center stripping tube that runs through packing cavity in the reactor, the upper and lower end opening of center stripping tube, stripping tube lower ending opening place, center is provided with inlet pipe, the top of center stripping tube is provided with the membrane carrier separator, and the top of center stripping tube is stretched in the membrane carrier separator, it is characterized in that: the ingress of rising pipe is provided with the adjustable sleeve of high and low position.
2. self-cleaning type activated biofiler as claimed in claim 1, it is characterized in that: the outer wall of rising pipe ingress is provided with outside screw, be provided with the internal thread suitable with outside screw in the sleeve, the degree of depth that the height of sleeve position is regulated outside screw and screw-internal thread fit by turnbarrel is regulated.
3. self-cleaning type activated biofiler as claimed in claim 1 or 2, it is characterized in that: reactor is right cylinder or polygonal body, when reactor is right cylinder, the bottom of packing cavity is the taper bucket, when reactor is polygonal body, the packing cavity bottom is the chamfered edge taper, and its cross section is the Polygons that adapts with the polygonal body cross section.
4. self-cleaning type activated biofiler as claimed in claim 3, it is characterized in that: described water distribution system comprises the person in charge of ring-type, and the person in charge is provided with arm, and the person in charge is provided with water-in, water-in is connected with water inlet pipe.
5. self-cleaning type activated biofiler as claimed in claim 4 is characterized in that: when reactor was right cylinder, the bus at the taper bucket intersection point place of the extended line of arm and itself and packing cavity was 90 ± 5 °; When reactor was polygonal body, the packing cavity inwall at the intersection point place of the extended line of arm and itself and packing cavity was 90 ± 5 °.
6. self-cleaning type activated biofiler as claimed in claim 1 or 2, it is characterized in that: described membrane carrier separator comprises urceolus, the inwall of urceolus is provided with the ring protection circle, be provided with first step baffle plate in the urceolus, the upper end open of center stripping tube is positioned under the first step baffle plate of membrane carrier separator urceolus, and center stripping tube upper end open communicates with urceolus inside; The outer tube inner wall of first step baffle plate below is provided with one or more downward-sloping baffle plates, and the urceolus of first step baffle plate top is provided with the aperture, and the outside of position, aperture is provided with a shell on the urceolus, and the bottom of shell is provided with shore pipe.
7. self-cleaning type activated biofiler as claimed in claim 1 or 2 is characterized in that: the top of the water distribution system in the described packing cavity is provided with aerating system, and the inlet mouth of aerating system is connected with inlet pipe.
8. self-cleaning type activated biofiler as claimed in claim 1 or 2, it is characterized in that: the bottom of described packing cavity is provided with evacuated tube.
9. self-cleaning type activated biofiler as claimed in claim 1 or 2 is characterized in that: the exit of inlet pipe extends to 1-2cm in the stripping tube lower ending opening of center.
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| CN201310186783.2A CN103241828B (en) | 2013-05-20 | 2013-05-20 | Self-cleaned activated biofilter |
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| CN201310186783.2A CN103241828B (en) | 2013-05-20 | 2013-05-20 | Self-cleaned activated biofilter |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105152310A (en) * | 2015-09-22 | 2015-12-16 | 南京大学 | In-situ excitation method of biological aerated filter aged biological film |
| CN106745657A (en) * | 2017-01-20 | 2017-05-31 | 苏州新能环境技术股份有限公司 | A kind of method and device of continuous moving bed catalytic oxidation treatment wastewater from chemical industry |
| CN108117151A (en) * | 2016-11-29 | 2018-06-05 | 中国石油化工股份有限公司 | A kind of moving bed denitrification denitrogenation filter tank and denitrogenation method |
| CN116621397A (en) * | 2023-07-24 | 2023-08-22 | 长沙潇水环保科技有限公司 | Sewage treatment system and sewage treatment method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0884117A2 (en) * | 1997-06-10 | 1998-12-16 | REHAU AG + Co | Device for removing gases from a landfill |
| CN201305475Y (en) * | 2008-11-13 | 2009-09-09 | 北京海斯顿水处理设备有限公司 | Bushing-type flow regulator |
| CN101972565A (en) * | 2010-06-27 | 2011-02-16 | 石亮 | Self-cleaning cloth-media filter |
| CN201912797U (en) * | 2010-11-10 | 2011-08-03 | 中冶京诚工程技术有限公司 | Adjustable oil-water separator |
| CN102424477A (en) * | 2011-10-27 | 2012-04-25 | 徐洪斌 | Counterflow moving bed biological advanced denitrification processing apparatus |
| CN202246256U (en) * | 2011-10-27 | 2012-05-30 | 徐洪斌 | Reverse-flow type moving bed biological advanced denitrification treatment device |
| CN203284251U (en) * | 2013-05-20 | 2013-11-13 | 郑州大学 | Self-cleaning activated bio-filter |
-
2013
- 2013-05-20 CN CN201310186783.2A patent/CN103241828B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0884117A2 (en) * | 1997-06-10 | 1998-12-16 | REHAU AG + Co | Device for removing gases from a landfill |
| CN201305475Y (en) * | 2008-11-13 | 2009-09-09 | 北京海斯顿水处理设备有限公司 | Bushing-type flow regulator |
| CN101972565A (en) * | 2010-06-27 | 2011-02-16 | 石亮 | Self-cleaning cloth-media filter |
| CN201912797U (en) * | 2010-11-10 | 2011-08-03 | 中冶京诚工程技术有限公司 | Adjustable oil-water separator |
| CN102424477A (en) * | 2011-10-27 | 2012-04-25 | 徐洪斌 | Counterflow moving bed biological advanced denitrification processing apparatus |
| CN202246256U (en) * | 2011-10-27 | 2012-05-30 | 徐洪斌 | Reverse-flow type moving bed biological advanced denitrification treatment device |
| CN203284251U (en) * | 2013-05-20 | 2013-11-13 | 郑州大学 | Self-cleaning activated bio-filter |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105152310A (en) * | 2015-09-22 | 2015-12-16 | 南京大学 | In-situ excitation method of biological aerated filter aged biological film |
| CN105152310B (en) * | 2015-09-22 | 2017-05-10 | 南京大学 | In-situ excitation method of biological aerated filter aged biological film |
| CN108117151A (en) * | 2016-11-29 | 2018-06-05 | 中国石油化工股份有限公司 | A kind of moving bed denitrification denitrogenation filter tank and denitrogenation method |
| CN106745657A (en) * | 2017-01-20 | 2017-05-31 | 苏州新能环境技术股份有限公司 | A kind of method and device of continuous moving bed catalytic oxidation treatment wastewater from chemical industry |
| CN116621397A (en) * | 2023-07-24 | 2023-08-22 | 长沙潇水环保科技有限公司 | Sewage treatment system and sewage treatment method |
| CN116621397B (en) * | 2023-07-24 | 2023-10-20 | 长沙潇水环保科技有限公司 | Sewage treatment system and sewage treatment method |
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